Rope-thrusting shovel



' R. s". HOAR ROPE THRUSTING SHOVEL Dec.- 8, 1925- Filed Feb 5, 1923 2 sheets-Sheet. 1

INVENTOR.

ROGER Jazz/v4 l/om E ii: i

ATTORNEY.

Dec. 8, 1925- 1,564.79] v .R. s. HOAR ROPE THRUSTING SHOVEII Filed Feb. 3, 1923 2 Sheets-Shoot 2 A TTORNEY.

/0/Zl BY Patented Dec. 8, 1925.

UNITED STATES I a 1,564,791 PATENT OFFICE.

ROGER SHERMAN HOAR, OF SOUTH MILWAUKEE, WISCONSIN, ASSIGNOR TO BUCYRUS COMPANY, OF SOUTH MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

ROPE-THRUSTING SHOVEL.

Application filed February 3, 1923. Serial No. 616,688.

To all whom it may concern:

Be it known that I, ROGER SHERMAN How,

a citizen of the United States,-residin at South Milwaukee, in the county of ilwaukee and State of \Visconsin, have invented a certain new and useful Improvement in Rope-Thrusting Shovels, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to power shovels of the type in which thrusting or shifting of the dipper handle is effected by cables actuated and controlled from the main frame..

The general aim of the present invention is to slmphfy and improve the construction .and operation of shovels of this character.

structed in accordance with the present in-' vention.

Figure 2 is a detail of the mounting of the dipper handle as it would appear look in downwardly lengthwise of the handle.

l igure 3 is a side elevation of a shovel similar to that of Figures 1 and 2 illustrating a different arrangement of cables.

Figure 4 is a view similar to Figure 3 illustrating a modified mounting for the dip! per handle and a modified arrangement of cables.v

-Figure 5 is a sectional view taken substantially alongthe, line 5-5 of Figure 4. The shovel illustrated in Figures 1 and 2 includes-the usual operating frame or platform having a boom 11 mounted toswing about a horizontal pivot 12, carried by the frame and supported inany desired position of inclination by the cable 13 in the usual manner. The boom shown is composed of a pair of channel bars 11' spaced usual dipper 15.

The dipper handle is mounted for lengthwise shifting movement in a rock frame 16, comprising triangular side plates 17frigidly connected by stub shafts 18 carrying hearing rollers 19 and 19. This frame is pivotally supported upon trunnions 20 connected to the side plates and journaled in hearing brackets 21 fixed to the boom. -The dipper handle extends through the rock frame beneath the upper bearing roller 19' and rests upon the lower bearing rollers 19. It will be noted that the trunnions 20 are disposed intermediate the upper and lower bearing rollers so that the frame 16, and consequently the dipper handle, rocks about an axis which intersects the ath of lengthwise shifting of the handle. ny binding action between the handle and rock frame is thus avoided.

The dipper handle is normally restrained against outward shifting movement by a cable 22 which, in this instance, is shown anchored at 23 to the dipper handle adjacent the outer end thereof. Gable 22 passes over a sheave 24 journaled upon one of the trunnions 20 and is actuated and controlled by a drum 25 to which it is secured.

The dipper handle is biased toward outward shifting movement by the working tension in the dipper hoisting cable-26. In the shovel shown in Figures 1 and 2, this cable extends from a hoisting drum 27 over a sheave 28 mounted adjacent the outer end of the boom, thence downwardly beneath a dipper supporting padlock sheave29, along the dipper handle to and around a sheave 30 carried adjacent the inner end thereof, and then to a swinging anchorage on the other of the trunnions 20 to which it is secured. Thus, the hoisting cable not only serves to support the dipper, but the resulting tension therein, through that portion thereof adjacent the sheave 30, produces an outward endwise thrust upon the dipper hanwardly. This thrusting action is controlled and inward thrusting effected by a cable 22 anchored as at 23 to the dipper end of the dipper handle and passing over a sheave 33 carried by the rock frame. Sheaves 31 They are independently actuated from a single prime mover (not shown) through a constantly moving shaft 43 A clutch member 42 slidably keyed to this shaft, for selective engagement and disengagement with drum 27 is conventionally shown in Figure 1. A brake 41 for drum 27 is conventionall y shown in Figure 1. A similar clutch and brake exist for drum 25, but are not shown.

To illustrate the, operation of the shovel described, assume that the dipper is in the lower digging position, as indicated by dotted lines in Figure 1, and that the drum is held by its brake against rotation. Upon rotation of the hoisting drum 27 in a counter-clockwise direction, the hoisting cable 26 is drawn, in, the dipper is raised, and the dipper handle swung about the axis of trunnions 20 as a center. If it is desired to force the dipper deeper into the bank or to shift the dipper to an outer extreme position for dumping purposes, this may be accomplished by merely releasing the drum 25 so as to pay outthe cable 22 and thus permit the dipper handle to shift outwardly under the pressure of the hoisting cable 26 against and 33 are so disposed as to cause the cables 26 and 22, respectively, to pass substantially across or adjacent the pivotal axis 20 of the dipper handle in all angular positions thereof so as to avoid any material lengthwise movement of these cables toward or from that axis due to swinging of the handle. Thus, as in the shovel above described, the thrusting portion of the hoisting cable swings with the dipper handle about the pivotal axis thereof without relative motion between that cable portion and handle due to swinging of the handle. \Vear between the hoisting cable and sheaves and 31 is' thus reduced to a minimum.

The shovel illustrated in Figures 4 and 5 comprises a boom 11' carrying a bifurcated dipper handle 14 straddling the boom. Each leg of the dipper handle is slidably mounted between cooperating bearing rollers 34: carried by a rock frame'16'. Frames 16' are supportedupon the ends of a shaft 20' fixed in brackets 21"carried by the boom.

The hoisting cable 26 extends from the hoisting drum (not shown) beneath a sheave 35, journaled on the shaft 20, over a sheave the sheave 30. Similarly, to shift the han-.

dle inwardly, it is only necessary to rotate the drum 25 in a counter-clockwise direction so as to draw in the cable 22 against the thrusting influence of the hoisting cable. Thus it will be noted that the thrusting action-of the dipper handle is always under the complete control of the drum 25 irrespec'tive of the operating condition or action of the hoisting drum and cable.' The shovel illustrated in Figure 3 is similar in many respects to that hereinabove described. It includes a split boom 11 having a dipper handle 14 extending therethrough, the dipper handle being slidably mounted in a similar rock frame 16 pivotally mounted as at 20 upon the boom. In this instance, however, the hoisting cable 26 is reeved two part. After passing over the usual sheave 28 at the upper end of the boom and beneath the dipper supporting padlock sheave 29, it is returned over a secondsheave at the upper end of the boom, similar to sheave 28, and from thence extends beneath a sheave 31v journaled upon the rock frame 16, over the sheave 30 carried by the inner end of the dipper handle and is anchored as at 32 upon the rock frame.

As in the shovel hereinabove described, the tension in that portion of the hoisting cable 26 adjacent the sheave 30 tends at all times to thrust the dipper handle out- 30, 'journaled between the legs of the dipper handle at the inner end thereof, beneath a second sheave 36, journaled on shaft 20,

thence over a sheave 28, at the upper end of the boom, down beneath the dipper support: ing padlock sheave 29' and finally back to the upper end of the boom where it is anchored as at 37.

As in the shovels herein-above described, .the tension in that portion of the hoisting cable between sheave 30' and sheaves 34 and 35 tends at all times to thrust the dipper handle outwardly. This thrusting action is controlled and inward thrusting effected by a cable 22 anchored as at 23 to the dipper end of the dipper handle and passing over a sheave 3S journaled on the shaft 20. It will be noted that the thrusting portion of the hoisting cable is arranged to swing with the dipper handle so as to avoid any whipping action of the cable against the sheave 30' during swinging of thehandle.

Various changes may be made in any of the embodiments of the invention hereinabove specifically described, without departing from or sacrificing any of the advantages of the invention as defined in the appended claims.

I claim:

1. In a power shovel, the combination of a support, a dipper and dipper handle mounted thereon for swinging and shifting movements, a dipper hoisting cable having a portion associated with said dipper handle at a fixed point thereof, to shift said handle, said portion extending substantially the entire length of said dipper handle in all its positions and being arranged to swin with said dipper handle about the pivota axis thereof as a center and means for controlling such shifting movement.

2. In a power shovel, the. combination with a supporting boom, of a dipper and dipper handle mounted thereon to move lengthwise and swing with respect thereto,

v a bight in said line in end-thrust enga ment with the dipper handle, said cable ing connected beyond said, bight with the boom, and se arate means for moving said dipper inwar 1y. I

4. In a power shovel, the combination with the supporting boom, of a dipper handle carried by said boom for swinging and shifting movements relative thereto, a

I hoisting drum, a sheave on the outer end portion of the boom, sheaves on the up er and lower end portions of the dipper han e, a hoisting and thrustin cable passing from said drum over the] sheave on the boom, thencearound the lower sheave on the handle, thence over the up r sheave on 'the handle and thence to the m, a swinging anchorage connection for said cable with the boom, and another cable for moving the dipper inwardly toward the boom.

5. In a power shovel, the combination with the supporting boom, of a dipper and dipper handle mounted thereon to shift and swing with respect thereto, a dipper hoisting and thrusting cable havin a single hoist line connection with the, ipper. and

having a bight in end-thrust engagement;

with said dipper handle for crowding the dipper, and a separately controlled cable for moving said dip er inwardly.

(5. In a power s ovel, the combination with the'su porting boom, of .a dipper handle carried y said boom for swingin and shifting movements relativethereto,a

oisti v thrusting 'cable passing from said drum over the-sheave on the boom, thence around the lower sheave on the handle, thence over the upper; sheave-on the handle, and thence to the boom, and having a swinging anchorage connection with said boom, and separate means for/moving the dipper handle inwardly;

7. In a power shovel, the combination with a supporting boom, of a dipper and dipper handle mounted thereon to move lengthwise and swing with respect thereto, an odd part hoisting and, thrusting cable associated with said dipper and dipper handle and pulling directly thereon for crowding the dipper; and means distinct from said cable for moving said dipper inwardly. I

8. In a power shovel, the combination with the supporting boom, of a dipper and dipper handle mounted thereon to shift and swing with respect thereto, a dipper hoisting and thrusting cable having an odd part connection with the dipper and having a bight in end-thrust engagement with said \dipper handle for crowding the dipper, and

a separately controlled cable for. moving said dipper inwardly.

9. In a power shovel, the combination with the supporting boom, of a dipper handle carried by said boom for swinging and shifting movements relative thereto, a hoisting drum, a hoisting and thrusting cable connected with said drum, dipper and boom, com rising a hoistline portion with an odd num er of reaches from said boom to said dipper, and a bight in said line in end-thrust engagement with the dipper handle, said cable being connected beyond said bight with the boom, and separate means for moving said dipperinwardly.

'10. In a' owe'r' shovel, the combination of a boom, a ame, a dipperhandle mounted for lengthwise reci rocation in said frame, means for supporting said frame on said boom to lpermit said frame and handle to swing about an axis passing through said handle, two bearing rollers below said handle carried by said frame and positioned from each other in the direction of the length of said handle, a guide roller above said handle carried by said frame, and- 

